$Complete::Common::OPT_CI => bool (default: from COMPLETE_OPT_CI or 1)

In bash/readline, this is akin to setting "completion-ignore-case".

$Complete::Common::OPT_WORD_MODE => bool (default: from COMPLETE_OPT_WORD_MODE or 1)

Word mode matching is normally only done when exact matching fails to return any candidate. To give you an idea of how word-mode matching works, you can run Emacs and try its completion of filenames ("C-x C-f") or function names ("M-x"). Basically, each string is split into words and matching is tried for all available word even non-adjacent ones. For example, if you have "dua-d" and the choices are ("dua-tiga", "dua-empat", "dua-lima-delapan") then "dua-lima-delapan" will match because "d" matches "delapan" even though the word is not adjacent. This is convenient when you have strings that are several or many words long: you can just type the starting letters of some of the words instead of just the starting letters of the whole string (which might need to be quite long before producing a unique match).

$Complete::Common::OPT_CHAR_MODE => bool (default: from COMPLETE_OPT_CHAR_MODE or 1)

This mode is like word-mode matching, except it works on a character-by-character basis. Basically, it will match if a word contains any letters of the string in the correct order. For example, "ap" will match "ap", "amp", "slap", or "cramp" (but will not match "pa" or "pram").

Character-mode matching is normally only done when exact matching and word-mode fail to return any candidate.

$Complete::Common::OPT_FUZZY => int (default: from COMPLETE_OPT_FUZZY or 1)

Fuzzy matching is normally only done when exact matching, word-mode, and char-mode matching fail to return any candidate.

$Complete::Common::OPT_MAP_CASE => bool (default: from COMPLETE_OPT_MAP_CASE or 1)

All Complete::Path-based modules (like Complete::File, Complete::Module, or Complete::Riap) respect this setting.

$Complete::Common::OPT_EXP_IM_PATH => bool (default: from COMPLETE_OPT_EXP_IM_PATH or 1)

All Complete::Path-based modules (like Complete::File, Complete::Module, or Complete::Riap) respect this setting.

$Complete::Common::OPT_DIG_LEAF => bool (default: from COMPLETE_OPT_DIG_LEAF or 1)

Suppose you have files like this:

 a
 b/c/d/e
 c

If you complete for "b" you will directly get "b/c/d/e" (the leaf).

This is currently experimental because if you want to complete only directories, you won't get b or b/c or b/c/d. Need to think how to solve this.

COMPLETE_OPT_CI => bool

COMPLETE_OPT_FUZZY => int

COMPLETE_OPT_WORD_MODE => bool

COMPLETE_OPT_MAP_CASE => bool

COMPLETE_OPT_EXP_IM_PATH => bool

COMPLETE_OPT_DIG_LEAF => bool